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參數資料
| 型號： | REG711EA-5/2K5 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 0.005 A SWITCHED CAPACITOR REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | GREEN, MSOP-8 |
| 文件頁數： | 1/13頁 |
| 文件大小： | 349K |
| 代理商： | REG711EA-5/2K5 |
50mA SWITCHED-CAP DC/DC CONVERTER
REG711
FEATURES
q WIDE INPUT RANGE: 1.8V TO 5.5V
5V VERSION: 2.7V TO 5.5V
q AUTOMATIC STEP-UP/STEP-DOWN
OPERATION
q LOW INPUT CURRENT RIPPLE
q LOW OUTPUT VOLTAGE RIPPLE
q MINIMUM NUMBER OF EXTERNAL
COMPONENTS—NO INDUCTORS
q 1MHz INTERNAL OSCILLATOR ALLOWS
SMALL CAPACITORS
q “SHUTDOWN” MODE
q THERMAL AND CURRENT LIMIT
PROTECTION
q FIVE OUTPUT VOLTAGES AVAILABLE:
5.0V, 3.3V, 3.0V, 2.7V, 2.5V
q THIN, SMALL PACKAGE: MSOP-8
APPLICATIONS
q SMART CARD READERS
q CELLULAR PHONES
q SIM CARD SUPPLIES
q PORTABLE COMMUNICATION DEVICES
q PERSONAL DIGITAL ASSISTANTS
q MODEMS
q NOTEBOOK AND PALM-TOP COMPUTERS
q ELECTRONIC GAMES
q HANDHELD METERS
q PCMCIA CARDS
q CARD BUSES
q LCD DISPLAYS
DESCRIPTION
The REG711 is a switched capacitor voltage con-
verter, which produces a regulated, low ripple output
voltage from an unregulated input voltage. A wide
input supply voltage of 1.8V to 5.5V makes the
REG711 ideal for a variety of battery sources, such as
single cell Li-Ion, or two and three cell Nickel or
Alkaline based chemistries.
The input voltage may vary above and below the
output voltage and the output will remain in regula-
tion. It works equally well for step up or down without
the need for an inductor, providing low EMI DC/DC
conversion. The high switching frequency allows the
use of small surface-mount capacitors, saving board
space and reducing cost. The REG711 is thermally
protected and current limited, protecting the load and
the regulator during fault conditions. Typical ground
pin current (quiescent current) is 1mA at full load,
60
A with no load, and less than 1A in shutdown
mode. This regulator comes in a thin MSOP-8 pack-
age with a component height of less than 1.1mm.
REG711
Copyright 2000, Texas Instruments Incorporated
SBVS027A
Printed in U.S.A. February, 2001
www.ti.com
C
PUMP
C
IN
PGND
ENABLE
GND
C
OUT
R
LED
+
REG711
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